Customers at a gas station pay with a credit card (A), debit card (B), or cash (C). Assume that successive customers make independent choices with P(A) = 0.6, P(B) = 0.1, and P(C) = 0.3.

a. Among the next 100 customers, what are the mean and variance of the number who pay with a debit card?
b. Answer part (a) for the number among the 100 who don't pay with cash.

answer: y=0 if that is what u r looking for

answer:   28.56 feet (approx)

step-by-step explanation:

since, triangle abc has measure of angle c equal to 55 degrees, measure of angle abc equal to 90 degrees, and length of bc equal to 20 feet.

we have to find out the measurement of segment ab.

therefore, tan 55° =

but bc = 20 feet.

⇒ tan 55 ° =  

⇒ ab = 20 × tan 55 °

⇒ ab = 20 × 1.42814800674

⇒ ab = 28.5629601348   ≈ 28.56 feet

it would take 5 hours i think idk i'm not that good at math.can you me with my questions i need asap.